Load three libraries and a dataset. In the next slide we plot crime versus pctmetro using color to differentiatie on variable single.
library(plotly)
## Warning: package 'plotly' was built under R version 3.4.4
## Loading required package: ggplot2
## Warning: package 'ggplot2' was built under R version 3.4.4
## ## Attaching package: 'plotly'
## The following object is masked from 'package:ggplot2': ## ## last_plot
## The following object is masked from 'package:stats': ## ## filter
## The following object is masked from 'package:graphics': ## ## layout
library(foreign) library(MASS)
## ## Attaching package: 'MASS'
## The following object is masked from 'package:plotly': ## ## select
cdata <- read.dta("https://stats.idre.ucla.edu/stat/data/crime.dta")